Secondary circuit conversion device

Abstract

The utility model discloses a secondary circuit conversion device, which comprises a box body, a transformer arranged in the box body, a terminal strip, a first aviation plug and a second aviation plug integrated piece, the terminal strip comprises a plurality of first wiring ports arranged on the side surfaces of the wire inlet end and the wire outlet end, second wiring ports arranged corresponding to the top surfaces of the wire inlet end and the wire outlet end, and a plurality of short-circuit sheets arranged in the middle of the second wiring ports; the terminal strip is electrically connected with the transformer; one end of the first aviation plug is electrically connected with the to-be-tested product, and the other end is electrically connected with the first wiring port of the wire outlet end according to a first preset wiring mode; one end of the second aviation plug integrated part is electrically connected with the precision testing device and the power supply, and the other end is electrically connected with the first wiring port of the wire inlet end according to a second preset wiring mode. According to the utility model, a precision test function, a switching-on and switching-off indication function and a verification function which are compatible with various different types of mutual inductors are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of auxiliary equipment for circuit test, especially relates to a secondary circuit conversion device. BACKGROUND

[0002] In the prior art, the secondary circuit conversion device is mainly used for connecting primary equipment and secondary equipment to realize signal conversion and transmission, and it is responsible for transmitting measurement and control signals and involves protection and automation functions. By using the secondary circuit conversion device, the problems of device stability, debugging and maintenance difficulty can be effectively solved.

[0003] For the precision test of the pole-mounted circuit breaker transformer, the conventional operation is to replace the corresponding aviation plug according to different transformer models, which results in too many lines and a complicated plugging process. Therefore, the secondary circuit conversion device is developed to solve the compatibility problem of transformer precision test. UTILITY MODEL CONTENTS

[0004] To solve the above technical defects, the utility model adopts the technical scheme, which provides a secondary circuit conversion device, which realizes the purpose of compatibility of different types of transformer precision test.

[0005] In order to achieve the above purpose, the utility model provides a secondary circuit conversion device, which is connected with a power supply, a product to be tested and a precision test device, and comprises a box body, a transformer, a terminal strip, a first aviation plug and a second aviation plug integrated piece arranged in the box body.

[0006] The terminal strip comprises a plurality of first connection ports arranged on the side surfaces of the incoming line end and the outgoing line end, a plurality of second connection ports arranged on the top surfaces of the incoming line end and the outgoing line end, and a plurality of short-circuiting pieces arranged in the middle of the second connection ports; the position of the short-circuiting pieces is movable.

[0007] The terminal strip is electrically connected with the transformer; one end of the first aviation plug is electrically connected with the product to be tested, and the other end is electrically connected with the first connection port of the outgoing line end in a first preset connection mode; one end of the second aviation plug integrated piece is electrically connected with the precision test device and the power supply respectively, and the other end is electrically connected with the first connection port of the incoming line end in a second preset connection mode; by moving the position of the short-circuiting pieces or connecting the corresponding second connection ports with wires, the precision test of the product to be tested of different types of transformers is converted.

[0008] Preferably, the second aviation plug integrated piece is an integrated piece of a 14-core aviation plug, a 6-core aviation plug and a 220V power supply wire.

[0009] Preferably, one end of the 220V power supply wire is connected to a power supply, the other end is connected to the first designated end point of the terminal block, and is connected to the L and N ends of the transformer through the terminal block.

[0010] Preferably, the first preset wiring mode is to connect the first wiring port of the outgoing line end according to the wiring aviation plug definition of the electronic or electromagnetic transformer;

[0011] The second preset wiring mode is that one end of the 14-core aviation plug is connected to a precision testing device, and the other end is connected to the first wiring port of the incoming line end according to the wiring aviation plug definition of the electronic or electromagnetic transformer; one end of the 6-core aviation plug is connected to a precision testing device, and the other end is connected to the first wiring port of the incoming line end according to the wiring aviation plug definition of the electronic or electromagnetic transformer.

[0012] Preferably, the secondary circuit conversion device further comprises a verification module; the verification module is composed of an indication unit, a button unit, and a plurality of connecting wires.

[0013] Preferably, the number of transformers is three; the indication unit comprises a first indication unit, a second indication unit, and a third indication unit; the button unit comprises a first button unit, a second button unit, and a third button unit.

[0014] Preferably, the indication unit is an indication lamp.

[0015] Preferably, a display screen is arranged outside the transformer; the display screen is used to display the voltage value of the precision testing device.

[0016] Preferably, the number of first wiring ports of the incoming line end and the outgoing line end is more than 28.

[0017] Preferably, the type of transformer tested by the secondary circuit conversion device is an electronic transformer or an electromagnetic transformer.

[0018] Compared with the prior art, the utility model has the beneficial effects that: 1, the aviation plug definition of the electronic or electromagnetic type and different wiring modes are adopted, when different transformer models are compatible, only the short-circuit piece needs to be moved or the short-circuit wire is connected, and the operation is simple and convenient; 2, through the closing button unit, remote control closing operation can be realized, the intelligentization and safety and reliability of operation are improved; 3, through the corresponding indication unit and button unit, the indication effect of operation steps is realized; 4, through the display unit of the transformer, the detection and verification effect of high and low voltage control test can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 Structure diagram of the secondary circuit conversion device embodiment two (internal wiring is not shown);

[0021] Figure 2 Module schematic diagram of the secondary circuit conversion device and the power supply and the precision test device;

[0022] Figure 3 Air plug definition diagram of the 6-core air plug of the incoming line end;

[0023] Figure 4 Air plug definition diagram of the 14-core air plug of the incoming line end;

[0024] Figure 5 Air plug definition diagram of the electromagnetic 26-core air plug of the outgoing line end of the electromagnetic precision test;

[0025] Figure 6 Wiring diagram of the first air plug and the second air plug integrated piece of the electromagnetic precision test;

[0026] Figure 7 Air plug definition diagram of the electromagnetic 26-core air plug of the outgoing line end of the primary and secondary fusion electronic precision test;

[0027] Figure 8 Wiring diagram of the first air plug and the second air plug integrated piece of the primary and secondary fusion electronic precision test;

[0028] Figure 9 Air plug definition diagram of the electromagnetic 26-core air plug of the outgoing line end of the depth fusion electronic precision test with capacitor;

[0029] Figure 10 Wiring diagram of the first air plug and the second air plug integrated piece of the depth fusion electronic precision test with capacitor;

[0030] Figure 11 External wiring schematic diagram of the indicating unit, the button unit, and the transformer;

[0031] Figure 12 Structure diagram of the secondary circuit conversion device embodiment two (internal wiring is not shown). DETAILED DESCRIPTION

[0032] Clearly, the described embodiments are part of the present application and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0033] The direction terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc. are only the direction of the attached drawings. Therefore, the direction terms used are used to explain and understand the present application, and not to limit the present application.

[0034] The present application provides an embodiment of a secondary circuit conversion device. Referring to Figure 2 , the secondary circuit conversion device is connected with a power supply, a product to be tested and a precision testing device; wherein the product to be tested can be a pole-mounted circuit breaker and other products with a mutual inductor structure. Referring to Figure 1 , the secondary circuit conversion device comprises: a box body 1, a transformer 2, a terminal block 3, a first aviation plug 4 and a second aviation plug integrated piece 5 arranged inside the box body 1; specifically, the second aviation plug integrated piece 5 is an integrated piece of a 14-core aviation plug, a 6-core aviation plug and a 220V power supply wire. Considering that the first aviation plug 4, the 14-core aviation plug, the 6-core aviation plug and the terminal block 3 inside the box have more wiring, therefore, the internal wiring mode is shown in the structural diagram, and the specific internal wiring mode can be referred to Figures 3-11 ; wherein Figure 3 , Figure 4 , Figure 5 , Figure 7 , and Figure 9 , the first column of data is the test parameter of the product to be tested; the second data is the abbreviation corresponding to the test parameter; the third column of data is the number of the first aviation plug or the second aviation plug integrated piece; the fourth column of data is the number of the first wiring port or the second wiring port of the terminal block 3.

[0035] In the embodiment, the terminal row 3 includes: a plurality of first connection ports arranged on the side of the incoming line end and the outgoing line end, a plurality of second connection ports arranged on the top surface of the incoming line end and the outgoing line end, and a plurality of shorting pieces arranged between the second connection ports; the shorting pieces are movable, and can be moved forward and backward by being pushed, so as to connect or disconnect the first connection ports of the incoming line end and the outgoing line end. Since the terminal row 3 has a conventional structure, the first connection ports, the second connection ports, the shorting pieces and other structures are not described herein. The number of the first connection ports of the incoming line end and the outgoing line end is more than 28, and 28 is preferred in the embodiment, which saves the installation space and the manufacturing cost under the premise of realizing the compatible test.

[0036] In the embodiment, one end of the first aviation plug 4 is electrically connected to the product to be tested, and the other end is electrically connected to the first connection port of the outgoing line end in a first preset connection mode. The first preset connection mode is that the first connection port of the outgoing line end is connected according to the connection aviation plug definition of the electronic or electromagnetic transformer. The connection aviation plug definition of the electronic or electromagnetic transformer can be referred to in Figure 5 , Figure 7 , Figure 9 , and the first connection port of the outgoing line end of the terminal row 3 is connected according to different products to be tested.

[0037] In the embodiment, one end of the second aviation plug integrated piece 5 is electrically connected to the precision test device and the power supply, respectively, and the other end is electrically connected to the first connection port of the incoming line end in a second preset connection mode. The second aviation plug integrated piece is an integrated piece of a 14-core aviation plug, a 6-core aviation plug and a 220V power supply wire. Specifically, one end of the 220V power supply wire is connected to the power supply, and the other end is connected to the first designated end point of the terminal row and is connected to the L and N ends of the transformer through the terminal row.

[0038] In the embodiment, the second preset connection mode is that one end of the 14-core aviation plug is connected to the precision test device, and the other end is connected to the first connection port of the incoming line end according to the connection aviation plug definition of the electronic or electromagnetic transformer. The connection aviation plug definition of the electronic or electromagnetic transformer is referred to in Figure 4 The first connection port of the incoming line end of the terminal row 3 is connected according to different products to be tested. One end of the 6-core aviation plug is connected to the precision test device, and the other end is connected to the first connection port of the incoming line end according to the connection aviation plug definition of the electronic or electromagnetic transformer. The connection aviation plug definition of the electronic or electromagnetic transformer is referred to in Figure 3 The first connection port of the incoming line end of the terminal row 3 is connected according to different products to be tested.

[0039] In this embodiment, the first aviation plug 4 is a 26-pin aviation plug, and each wire is specifically named HC + number; each wire of the 6-pin aviation plug is specifically named HC1 + number; each wire of the 14-pin aviation plug is specifically named HC2 + number; after naming, corresponding number tubes can be attached for differentiation.

[0040] This utility model provides a detailed description of different types of current transformers compatible with pole-mounted circuit breaker products through specific embodiments:

[0041] (I) Accuracy Testing of Electromagnetic Instrument Transformers

[0042] When it is necessary to perform accuracy testing on electromagnetic current transformers, see [link / reference]. Figures 3-6 The wiring method involves connecting the 26-pin aviation connector to the first terminal of the output end in the order shown in the diagram, and connecting the corresponding 14-pin aviation connector and the 6-pin aviation connector in the order shown in the diagram. Figure 6 The connection is shown at the first terminal of the incoming line; in the electromagnetic precision test, only the current IA, current IB, current IC, current IN, zero-sequence current I0, and current common terminal I0 need to be tested. COM Zero-sequence voltage U0, common voltage terminal U0 COM The eight data items are located at the input / output terminals -7 to 12, input / output terminals -23, and input / output terminals -24, respectively. Therefore, by simply moving the shorting blocks at the above positions to make the first connection port of the input / output terminal connected, the accuracy test of the electromagnetic transformer can be achieved.

[0043] (II) Accuracy Testing of Primary and Secondary Integrated Electronic Instrument Transformers

[0044] When it is necessary to perform accuracy testing on a primary and secondary integrated electronic instrument transformer, see [link / reference]. Figures 3-4 , Figures 7-8 The wiring method is as follows; the data to be tested at this time is: zero-sequence current I0. + Zero-sequence current I0 - Current IB + Current IC + Current IC - Current IB - Current IA + Current IA - Voltage UA + Voltage UB + Voltage UC + Zero-sequence voltage U0 + The common voltage terminal is Uocom. According to the definition shown in the diagram, the zero-sequence current is I0. + The corresponding wiring positions are input terminal -20 and output terminal -24; zero-sequence current I0 -The corresponding wiring positions are the incoming terminal-21, the outgoing terminal-26, and so on.

[0045] It is considered that the plugging process of the first aviation plug 4 and the second aviation plug integrated piece 5 is cumbersome. Therefore, in the scheme provided by the utility model, the wiring mode of the first aviation plug 4 and the second aviation plug integrated piece 5 does not need to be changed in the electromagnetic conversion to electronic transformer precision test process, and only needs to be short-circuited according to Figure 8 As shown in the figure, the incoming terminal and the outgoing terminal of the second wiring port corresponding to the data to be tested are short-circuited by using the wires.

[0046] Figure 8 In the scheme, the digital code of the incoming terminal wiring port represents the actual position of the wiring port, but in order to make the wiring diagram beautiful, the above-mentioned mode is used for display. For example, the second wiring port at the first position from the right of the incoming terminal is short-circuited with the second wiring port at the 15th position from the right of the outgoing terminal; the second wiring port at the third position from the right of the incoming terminal is short-circuited with the second wiring port at the 10th position from the right of the outgoing terminal; and so on, and the corresponding positions are short-circuited one by one. Through the above-mentioned mode, the conversion of precision measurement of different types of transformers can be realized.

[0047] (Three) Precision test of electronic transformer with deep fusion and capacitance

[0048] When the precision test of the electronic transformer with deep fusion and capacitance is needed, since it has the voltage of the incoming terminal and the outgoing terminal, there are two different wiring methods. Method one, referring to the aviation plug definition of Figures 3-4 , Figure 9 and the wiring mode of Figure 10 , the 6 wires of the terminal row incoming terminal (current IA + , current IB + , current IC + , zero sequence current I0 + , zero sequence voltage U0 + , current common end I0 COM , voltage common end Uocom) need to be short-circuited first, IC - is short-circuited with Icom. ua + , ub + , uc + and ua1 + , ub1 + , uc1 + are connected by the conversion switch. After the above-mentioned wires are connected, the remaining wiring mode is similar to the wiring mode of the electronic transformer with deep fusion, and the 26-core aviation plug, the 14-core aviation plug and the 6-core aviation plug do not need to be plugged, and only need to be short-circuited according to Figure 10The terminals are arranged in the second connection ports corresponding to the positions of the incoming terminals and outgoing terminals.

[0049] Method two: without using the switch, first measure the phase voltage of the incoming terminal, then short the three-phase short-circuit wire of the incoming terminal voltage to the position of the outgoing terminal of the outgoing terminal, and then measure the phase voltage of the outgoing terminal. In the above two ways, the first method is preferred, which is more convenient and time-saving when testing the incoming and outgoing terminal voltage without unplugging the original incoming terminal phase power line.

[0050] It should be noted that during the precision test process, the circuit breaker of the product to be tested needs to be closed. When the circuit breaker is closed, considering that the power supply may cause electromagnetic interference to the precision test data, the plug should be unplugged before the precision test.

[0051] Through the above embodiment, only by rotating the position of the shorting piece or connecting the corresponding second connection port with the wire, the precision test of different types of mutual inductors can be converted, thereby improving the compatibility and operation convenience of the precision test.

[0052] In order to achieve the above purpose, the utility model also provides an embodiment two of secondary circuit conversion device, embodiment two on the basis of above mentioned embodiment one improves, the improvement lies in, the secondary circuit conversion device still includes: check module, check module is by indicating unit 7, button unit 6 and a plurality of connecting wires are constituted, specific wiring mode refers to Figure 11 .

[0053] In this embodiment, the indicating unit 7 includes: a first indicating unit, a second indicating unit, and a third indicating unit; the button unit 6 includes: a first button unit, a second button unit, and a third button unit.

[0054] In this embodiment, the first indicating unit is an energy storage indicating unit, the second indicating unit is a closing indicating unit, and the third indicating unit is an opening indicating unit; the first button unit is an energy storage button, the second button unit is a closing button, and the third button unit is an opening button. Referring to Figure 11 , the indicating unit is preferably an indicating lamp. If other conventional devices with indicating mode are used instead, it is also within the scope of the utility model. The transformer 2 is correspondingly provided with three; the transformer corresponds to an energy storage transformer, a closing transformer and an opening transformer. The transformer, indicating unit and button unit are one-to-one corresponding.

[0055] The wiring mode of the button unit 6, the indicating unit 7 and the three transformers 2 is that the negative voltage (V - ) of the three transformers 2 is connected to the negative voltage (V -), closing negative pole (HZ - ), opening negative pole (FZ - ) of the first wire; one end of the normally open contact of the first button unit, the second button unit and the third button unit is connected to the energy storage positive pole (CN + ), the closing positive pole (HZ + ), the opening positive pole (FZ + ) of the second wire, and the other end is connected to the voltage positive pole (V + ) of the three transformers 2 through the third wire; the ground ends of the three transformers 2 are connected in parallel through the fourth wire and then connected to a ground wire; wherein the ground wire is connected to the second specified end point of the terminal block 3; specifically, the second specified end point is defined as the terminal with the com defined on the terminal block 3.

[0056] One end of the first indication unit, the second indication unit and the third indication unit is connected in parallel to the voltage positive pole (V + ) of one of the transformers 2 through the fifth wire, and the other end is connected to the non-energy storage positive pole (WCN + ), the split positive pole (FW + ), the closing positive pole (HW + ) of the sixth wire; the voltage negative pole (V - ) of the transformer 2 is connected to the seventh wire of the remote communication common end (YXCOM).

[0057] In the embodiment, by adding the indication unit 7 and the button unit 6, the opening and closing operation during the precision test does not need to be manually performed, which is safer. Directly pressing the button to be operated can be realized. On the other hand, it can be confirmed whether the wiring is normal through the indication of the button and the corresponding indication unit 7, so as to realize the self-checking function of signal transmission and improve the reliability of the secondary circuit conversion device.

[0058] In order to achieve the above purpose, the utility model also provides an embodiment three of secondary circuit conversion device, embodiment three on the basis of above-mentioned embodiment two improves, the place for improvement lies in, the transformer 2 outside is provided with display screen 8;Display screen 8 is used to show the voltage value of precision test device.

[0059] In the process of operating the closing, opening and energy storage by the button unit 6, the display screen 8 on the three transformers 2 displays the voltage value of the circuit breaker operating mechanism of the product to be tested. The value can be used to detect whether the test is qualified. For example: (1) when 65% to 120% rated working voltage is applied, the operating mechanism normally opens, if the opening indicator light is on at this time, it means that the test is qualified, otherwise it means that the test is unqualified; (2) when less than 30% rated working voltage is applied, the operating mechanism cannot open; if the opening indicator light is off at this time, it means that the test is qualified, otherwise it means that the test is unqualified; (3) when 85% to 110% rated working voltage is applied, the operating mechanism normally closes, if the closing indicator light is on at this time, it means that the test is qualified, otherwise it means that the test is unqualified.

[0060] By adding the display screen 8, the intelligent degree and the visual degree of the secondary circuit conversion device can be further improved.

[0061] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0062] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, these modifications and variations of the present application are within the scope of the claims of the present application and its equivalent technologies, and the present application also intends to include these modifications and variations.

[0063] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application.

Claims

1. A secondary circuit conversion device, wherein the secondary circuit conversion device is connected to a power supply, a product under test, and a precision testing device, characterized in that, The secondary circuit conversion device comprises a box, a transformer arranged inside the box, a terminal array, a first aviation plug, and a second aviation plug integrated piece; The terminal array comprises a plurality of first connection ports arranged on the side of the incoming line and the outgoing line, a plurality of second connection ports arranged on the top surface of the incoming line and the outgoing line, and a plurality of shorting pieces arranged between the second connection ports; the position of the shorting pieces is movable; The terminal array is electrically connected to the transformer; one end of the first aviation plug is electrically connected to the product to be tested, and the other end is electrically connected to the first connection port of the outgoing line in a first preset connection mode; one end of the second aviation plug integrated piece is electrically connected to the precision testing device and the power supply, respectively, and the other end is electrically connected to the first connection port of the incoming line in a second preset connection mode; the precision testing of different types of transformers to be tested is realized by moving the position of the shorting pieces or connecting the corresponding second connection ports by wires.

2. The secondary circuit conversion device of claim 1, wherein, The second aviation plug integrated piece is an integrated piece of a 14-core aviation plug, a 6-core aviation plug, and a 220V power supply wire.

3. The secondary circuit conversion device of claim 2, wherein, One end of the 220V power supply wire is connected to the power supply, and the other end is connected to the first designated point of the terminal array and is connected to the L and N terminals of the transformer through the terminal array.

4. The secondary circuit conversion device of claim 3, wherein, The first preset connection mode is to connect the first connection port of the outgoing line according to the connection aviation plug definition of electronic or electromagnetic transformers; The second preset connection mode is that one end of the 14-core aviation plug is connected to the precision testing device, and the other end is connected to the first connection port of the incoming line according to the connection aviation plug definition of electronic or electromagnetic transformers; one end of the 6-core aviation plug is connected to the precision testing device, and the other end is connected to the first connection port of the incoming line according to the connection aviation plug definition of electronic or electromagnetic transformers.

5. The secondary circuit conversion device of claim 4, wherein, The secondary circuit conversion device further comprises a verification module; the verification module is composed of an indication unit, a button unit, and a plurality of connection wires.

6. The secondary circuit conversion device of claim 5, wherein, The number of transformers is three; the indication unit comprises a first indication unit, a second indication unit, and a third indication unit; the button unit comprises a first button unit, a second button unit, and a third button unit.

7. The secondary circuit conversion device of claim 6, wherein, The indication unit is an indication lamp.

8. The secondary circuit conversion device of claim 5, wherein, A display screen is arranged outside the transformer; the display screen is used to display the voltage value of the precision testing device.

9. The secondary circuit conversion device of any one of claims 1-8, wherein, The number of first connection ports of the incoming line and the outgoing line is more than 28.

10. The secondary circuit conversion device of any one of claims 1-8, wherein, The type of transformer for precision testing of the secondary circuit conversion device is electronic transformer or electromagnetic transformer.

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